1951 Alvis TB 21 vs. 1949 Opel Olympia
To start off, 1951 Alvis TB 21 is newer by 2 year(s). Which means there will be less support and parts availability for 1949 Opel Olympia. In addition, the cost of maintenance, including insurance, on 1949 Opel Olympia would be higher. At 2,993 cc (6 cylinders), 1951 Alvis TB 21 is equipped with a bigger engine. In terms of performance, 1951 Alvis TB 21 (91 HP @ 4000 RPM) has 55 more horse power than 1949 Opel Olympia. (36 HP @ 3400 RPM). In normal driving conditions, 1951 Alvis TB 21 should accelerate faster than 1949 Opel Olympia.
Compare all specifications:
| 1951 Alvis TB 21 | 1949 Opel Olympia | |
| Make | Alvis | Opel |
| Model | TB 21 | Olympia |
| Year Released | 1951 | 1949 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 1488 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 36 HP |
| Engine RPM | 4000 RPM | 3400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Length | 4430 mm | 4030 mm |
| Vehicle Width | 1680 mm | 1510 mm |
